Back in 1960, Astronomer Frank Drake started scanning two sun-like stars with an 85-foot wide antennae in West Virginia. His goal: search for signs of life. Over the past 50 years, thanks to the advantage of significant advances in electronics, digital technology, and some help from other people, that search has really ramped up. This month, Seth Shostak of the SETI (Search for Extraterrestrial Intelligence) Institute in Mountain View, CA, claims it is now estimated that by 2040 enough star systems will have been scanned to have discovered alien-produced electromagnetic signals.